"Jesse" is an alien from another planet,
convicted of political crimes and sent to Earth which is to serve as his "prison."
He is accompanied by a small floating robot, "Control," which is charged with
guarding and supervising him as his parole officer. Both are quickly adrift in
a strange world with unfamiliar customs, and Jesse has to make his way through
Earth (specifically Los Angeles), hoping for the day when his sentence is lifted
(which will occur when he learns compassion) and he can return home. Like most
drifters that get their own TV series, Jesse finds himself each week embroiled
with crooks preying on the innocent and ends up using his alien powers to help
them.